Compound lever.



0. DALFOND.

COMPOUND LEVER.

APPLICATION PILEDJAN. o. 1011.

1,035,324, Patented Aug. 13, 1912.

WITNESSES: lNl/E/VTOR I MML A TTORIVEYF COLUMBIA mnoamn 60-. WASHINONN,D. C.

UNITED OFFICE OCTAVIEN DALFOND, OF FALL RIVER, MASSACHUSETTS, ASSIGNORTO THE STANDARD EQUIPMENT COMPANY, A CORPORATION OF MASSACHUSETTS.

COMPOUND LEVER.

Specification of Letters Patent.

Application filed January 9, 1911.

Patented Aug. 13, 1912.

Serial No. 601,761.

To all whom it may concern:

Be it known that I, OCTAVIEN DALFONI), a citizen of the United States,residing at Fall River, in the county of Bristol and State ofMassachusetts, have invented certain new and useful Improvements inCompound Levers, of which the following is a specification.

This invention relates to an improvement in friction let offparticularly applicable to looms for weaving cotton, woolen and otherfabrics. Its object is to increase the steadiness of action of themachine.

A further object is to provide compactness, simplicity and a wide anddelicate adjustability of the tension, all of which objects, amongothers, are accomplished by the construction and combination of partshereinafter more particularly set forth and claimed.

In the drawings: Figure 1 represents a view in side elevation of adevice embodying my invention; Fig. 2, a top plan view of the same; andFigs. 3 and 4, detail plan views of a slight modification thereof.

Referring now to the drawings in detail, 71, designates a support orbracket of plate metal or other suitable material mounted on the frameof a loom or other machine to which it is applicable by means offastening devices passing through the holes 71, near its two lowercorners respectively, or other suit able means of securing the same inplace, and provided with two bolts about midway the width of said plateand in the same horizontal plane one near each end respectively. Twolevers b and f are mounted on said bracket by means of bolts 0 and 0respectively passing through said bolt holes. These two levers areseparated from the plate by means of washers Z and m mounted on bolts 0and 0 respectively between the hubs of said levers and the bracket h,the washer at being slightly thicker than the washer Z in order to holdthe hub of lever f at a greater distance from the bracket than the hubof lever I). These lovers are arranged normally in the same horizontalplane, parallel to each other and with their arms extending in oppositedirections toward the hubs of each other respectively, this arrangementbeing found to give the desired com-' pactness.

The lever f is straight and extends toward the right. It is providednear its hub with an enlargement having an upwardly flaring hole 9therethrough. The stem of a hook n, which engages the rope or chain (notshown) that passes over and around the friction pulley as usual, passesthrough this flaring hole 9. The bottom of this hole is slightycountersunk on a taper and flares downward, see Figs. 1 and 3. Awing-nut 0 having a convex upper face is turned on the lower end of thestem of hook n, the upward flaring of said hole g, the counter-sinkingof its lower end and the convexity of the face of nut 0 which engagesthe lower part of the lever f on the countersunk of said hole 9providing for the automatic adjustment of the inclination and directionthereof of the hook n with relation to the position of lever f. Saidlever f is further provided on its right hand end with a quadrant or setof gear teeth e. The lever b is bent on a sharp curve at its hub outwardaway from the bracket h and lever f and then runs from said curved part,which forms a rounded shoulder, straight outside of, and parallel with,said lever 7 toward the hub of the latter. An adjustable weight a isslidably mounted on said lever b and provided with a friction screw orbolt a for locking the weight a in any desired position of adjustment.Slight nicks or marks may be made in lever I), see Fig. 1, to aid inadjusting said weight. The hub of lever Z) is provided on its facetoward the lever f with a quadrant 01' series of gear teeth (Z meshingwith the gear teeth of lever b. It will be noted that the washer m,above mentioned, being thicker than washer Z, holds the lever f wellout, thus keeping the teeth 6 of the latter well over from the in neredge of the teeth cl, thus providing a safeguard against anyside-slipping of the former toward the bracket It.

The operation is very simple and obvious from the drawings and theabove. To increase the tension the weight a is slid along the lever Z)away from its hub to the point desired and locked by the friction screwa. Of course the farther away from the hub this weight is moved thegreater will be the leverage exerted by it. Thus the hub will graduallybe turned on the bolt 0, which acts as the fulcrum for said lever b, asthe weight is moved away from it. The teeth (Z thereof meshing with theteeth 6 of lever f will gradually therefore turn to the left and forcethe lever f to swing downward on its bolt 0', which acts as a fulcrumfor the same, thus lowering the hook n, which pulls on the rope or chainbefore mentioned but not shown. To decrease the tension the weight 0; isadjusted toward the hub of lever b and the reverse action from thatabove described takes place.

In the modification illustrated in Figs. 3 and 4 the lever f is providedon its right end with an integral fork i which receives a roller 7'mounted to rotate on a lug 7c integral with lever b. This constructiontakes the place of thegear teeth cl and 6 above described. Otherwise theconstruction and operation is the same as in the preferred form.

It will be understood that while in the drawing and the abovedescription the levers, their hubs and gear teeth, or in the modification the fork and lug are made integral this feature is not necessaryand also that other modifications may be made in the construction andarrangement of the several parts without departing from this invention.

Having thus described my invention,

what I claim as new and desire to secure by Letters Patent is: I

1. A pair of straight arms normally in the same horizontal plane, oneoutside of the other, pivoted at their opposite ends and provided attheir proximate ends with a pair of meshing cog gear segments, incombination with a weight adjustable on one of said arms and a hookattached to the other arm. I

2. A bracket and a pair of levers pivotally mounted thereon one outsideof the other and provided with intermeshing gearyteeth on theirproximate ends, in combination with a weight slidably adjustably mountedon one of said levers and a hook mounted in the other lever.

3. A; bracket and a pair of levers pivotally mounted thereon and runningin opposite directions toward the hubs of each other and provided withintermeshing gear teeth, in combination with an adjustable hook mountedin one of said levers and an adjustable weight slidably mounted on theother lever.

In testimony whereof,l affix my signature in the presence of twowitnesses.

OCTAVIEN DALFOND. WVitnesses:

FREDERICK R. JOHNSTON, ALVIN Gr. WEEKS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

